Felicity and Peter

Civil War
Felicity and Peter first met during the Avengers' Civil War fight in Germany. Though Felicity didn't know that Peter was Spider-Man at the time, she had a sneaking suspicion later on in their timeline together. Peter was the one to capture Felicity during the fight, and hold her away from the battle as Steve and Bucky got away.

New York
When Felicity was sent back to New York, Tony asked Peter to keep an eye on Felicity, fearing that she would try to run away or do something stupid. Felicity was annoyed that she now had a babysitter, but Peter learned to keep his distance, and she promised to never read his mind. The two only had brief back and forths when Peter was disguised as Spider-Man, and most of the time it would be Felicity sassing him.

Peter and Felicity got close when they were assigned a school project together. They realized that they had more in common than they thought: absent parents, adopted by their aunt/uncle, living in the same apartment building, etc. This was the first time Felicity felt that there was something different and special about Peter. In her new life, Felicity was trying ever so hard not read people's minds unless it was life threatening, so she didn't dare hear what it was that fascinated her about Peter, and vice versa.

Later, Felicity invited Peter to a party that Liz was hosting for her, in the hopes that she could admit how she has been feeling about him, and if he feels the same way. However, he left the party abruptly before she could tell him. Upset by how he acted at the party, Felicity spent the next few days afterwards wondering if he really didn't feel the same way about her. While waiting up late for him to show up so that they could work on their project together, Spider-Man landed on the fire escape outside of her room, wounded and barely breathing. Felicity pulled him in and started sewing him up. She finds a large gash in the back of his head that requires a trip to the hospital, but he insists that she doesn't take him. Left with no option, Felicity had to take off Spider-Man's mask in order to stitch it up. When she revealed his identity, she saw that it is Peter, and her heart sank. She wasn't upset or mad at him, but nervous that he was going to die. After operating on him, Felicity and Peter talked about him being Spider-Man, and she asked if Tony told him to become her friend... or maybe even more. Peter denied it and kissed Felicity to prove it.

Now unsure of what their relationship is, Felicity and Peter embarked on their decathlon trip to Washington D.C., however, Peter was avoid Felicity, and had started taking blockers. Annoyed by his absence, she confronted him about it. Peter then told her the entire truth about the Vulture and his investigation. Felicity wanted to go with him, but Peter told her that he had to do this on his own. So before Peter headed out to track down the Vulture and his men, Felicity went to Peter's room and asked him if he remembered anything from the night that she found out his identity. He admitted many things before kissing her again, and she came to the realization that it wasn't a dream or a lie. He liked her.

The next day, Felicity and Liz couldn't get a hold of Peter as they were ready to leave for the decathlon event. Deciding that they couldn't wait any longer, they left the hotel and headed to the event without him. After winning, the team decided to visit the Washington Monument. In the elevator, a piece of Peter's evidence blew up in Ned's backpack, destroying the elevator and the supports holding it up. Having to act fast, Felicity helped her friends out of the sticky situation-- all except her and Liz made it out in time before the elevator dropped again. Just in the nick of time, Peter caught them. However, after Felicity got out, the elevator fell again with Liz still inside. Peter managed to save her again.

On the way home, Peter cried. Felicity asked him what was wrong, and he admitted that he was scared that Felicity was going to die. Felicity reassured him that everything was alright, though she wasn't sure herself. When they got back to New York, Felicity was about to walk home when Aunt May stopped her and offered her a ride. Peter and Felicity sat together in the car on the way home, leaning against each other and holding hands.

After Washington, Peter knew that he couldn't leave anything up to chance or fate anymore. He knew that he wanted to date Felicity, so he asked her out in the most romantic way he could think of: on top of a New York skyscraper. He asked her to be his girlfriend and to go to the Homecoming dance with him, and she said yes. But Felicity made Peter promise that Tony would never find out, because then they would both be dead.

Despite Peter's best effort to keep Felicity out of the Vulture investigation, once they were dating, Felicity constantly worried about him. He managed to leave her a note one afternoon before going after the Vulture, hoping that it would ease Felicity's nerves, but it only made it worse. Worried about his safety, Felicity called her cousin and told him what was going on with Peter, including that they were dating. After being told by Tony that he would handle it and that she needed to stay out of it, Felicity stayed home and watched the news for anything about Spider-Man and Iron Man. Once the news broke the story, Felicity felt sick with worry. And when Peter didn't contact her afterwards, she went to May's apartment to see if she had heard from him. Nothing. Then, finally, when Peter does turn up, he explains that he lost the Stark internship-- meaning, Tony took his suit.

After losing the Spider-Man suit, Peter became extremely depressed. He didn't like going to school anymore or talking to Felicity. He wanted to be left alone, but Felicity wasn't going to let that happen. She took him to a park for a picnic with sandwiches from Mr. Delmar's. Felicity apologized because she hadn't meant for him to get in trouble with Tony, she just wanted to make sure that he was safe. Peter understood. To change the topic, Peter asked why Tony called Felicity Letty. Felicity explained that because it was sometimes hard to sift through thoughts during missions with the Avengers, they all came up with nicknames for her so that they communicate better. Peter asked if he could think of a nickname for her, and she agreed. While they were watching a movie together, Peter told Felicity that he thought of the nickname Ellie. Felicity loved it.

The night of the Homecoming dance, Liz's dad offered to drive them to the dance. When Peter met Liz's dad, he froze in a panic. Because he was still taking blockers, Felicity was unable to understand what was wrong with him. It wasn't until they were getting into the car that Felicity understood why Peter was so upset. Liz's dad was the Vulture. Knowing that he had no other option than to go after Liz's dad, Felicity bids Peter farewell and good luck. However, when she saw Ned slip out of the gym to help Peter, Felicity decided to follow him. Peter called Ned and was in desperate need of help. Cornered into deciding between Peter's life and death, Felicity decided to help him. She changed into her new Selestra suit and went to warn Happy of what was about to happen. After gaining no help from Happy or her cousin, Felicity went on a hunt to find Peter and help him take down the Vulture. Together, they battled the Vulture and managed to capture him and enough evidence needed to convict him. They left a note for the police that would give Spider-Man the credit he rightfully deserved.